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Craftsman
Gas Walk-Behind Mower

Model # 917388521 Official Craftsman gas walk-behind lawn mower

Here are the diagrams and repair parts for Official Craftsman 917388521 gas walk-behind lawn mower, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Owner’s manual
  View engine

Model diagram and schematic

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ALL PARTS
Showing 10 of 211 parts  |
Lock Nut 83923
#39

Engine/housing/handle/bag/blade diagram

Lock nut

Part #83923

Replaced by #532409149

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Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Handle Knob 181254
#14

Engine/housing/handle/bag/blade diagram

Handle knob

Part #181254

Replaced by #532185577

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Manufacturer substitution
This part replaces 181254. Substitute parts can look different from the original.
BEST SELLER
$10.64 | 
16% OFF Phone Price : $12.64
In Stock
Nut Lck 5/16 73990500
#51

Engine/housing/handle/bag/blade diagram

Nut lck 5/16

Part #73990500

Replaced by #596040501

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Manufacturer substitution
This part replaces 73990500. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.11
In Stock
Wheel 181624
#49

Engine/housing/handle/bag/blade diagram

Wheel

Part #181624

Replaced by #583103101

?
Manufacturer substitution
This part replaces 181624. Substitute parts can look different from the original.
BEST SELLER
$58.14 | 
9% OFF Phone Price : $64.14
In Stock
Lawn Mower Wheel, 8 X 2-in (replaces 157178, 180543) 150339
#37

Engine/housing/handle/bag/blade diagram

Lawn mower wheel, 8 x 2-in (replaces 157178, 180543)

Part #150339

Replaced by #532150339

?
Manufacturer substitution
This part replaces 150339. Substitute parts can look different from the original.
$32.98 | 
15% OFF Phone Price : $38.98
In Stock
Upstop Bracket 850733X004
#13

Engine/housing/handle/bag/blade diagram

Upstop bracket

Part #850733X004

Replaced by #532850733

?
Manufacturer substitution
This part replaces 850733X004. Substitute parts can look different from the original.
This item is not returnable
$8.54
In Stock
Lock Nut 751152
#16

Engine/housing/handle/bag/blade diagram

Lock nut

Part #751152

Replaced by #532191730

?
Manufacturer substitution
This part replaces 751152. Substitute parts can look different from the original.
This item is not returnable
$6.83
In Stock
Bolt 74780512
#8

Engine/housing/handle/bag/blade diagram

Bolt

Part #74780512

Replaced by #596030501

?
Manufacturer substitution
This part replaces 74780512. Substitute parts can look different from the original.
This item is not returnable
$6.83
In Stock
Lawn Mower Blade Adapter 184590
#57

Engine/housing/handle/bag/blade diagram

Lawn mower blade adapter

Part #184590

Replaced by #532418373

?
Manufacturer substitution
This part replaces 184590. Substitute parts can look different from the original.
$17.11
In Stock
Lawn & Garden Equipment Screw 851084
#53

Engine/housing/handle/bag/blade diagram

Lawn & garden equipment screw

Part #851084

Replaced by #532851084

?
Manufacturer substitution
This part replaces 851084. Substitute parts can look different from the original.
This item is not returnable
$6.83
In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Read more

Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Read more

Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Read more
Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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